CN1320745A - Impervious cement-earth wall and its construction method - Google Patents
Impervious cement-earth wall and its construction method Download PDFInfo
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- CN1320745A CN1320745A CN 00106109 CN00106109A CN1320745A CN 1320745 A CN1320745 A CN 1320745A CN 00106109 CN00106109 CN 00106109 CN 00106109 A CN00106109 A CN 00106109A CN 1320745 A CN1320745 A CN 1320745A
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Abstract
An impervious soil-cement wall consists of piles made by fully mixing cement paste with original soil of the dam. A unit wall is lap jointed by above two piles and multi-unit walls constitute the impervious wall. Between two piles of two adjacent unit walls, is lap jointed a sigle hole pile which the hole diameter of is biger than the hole diameter of the piles in the unit wall. The multihead-small diameter deep-agitating pile machine and normal single head deep agitating pile machine are used to construct the unit wall and single hole pipe separately for forming the continuous impervious soil-cement wall. The method has advantages of simple process, low cost and good impervious effect of the wall.
Description
The present invention relates to a kind of impervious cement-earth wall and job practices thereof.
Impervious cement-earth wall is to be realized by deep layer Beater operator method, and deep mixing method is early to originate from the U.S., introduce Japan after World War II and by Japanese development and application in Industrial and Civil Engineering, harbour, road and rail subgrade strengthening.The later stage seventies is introduced China, also is mainly used in above-mentioned field, and to the nineties, in Basin of Huaihe River, China has been applied to the success of reservoir seepage prevention of dam founda to common deep layer Beater operator method first.Because common deep layer Beater operator method is to adopt single drill bit, construction efficiency is low, and the big cost height of diameter, and every square metre of one-tenth wall cost reaches 200 yuan, and every machine-team only can become wall 30m
2Invented " multi-drill small-diameter deep-layer mixing pile cut-off wall technology " afterwards again in China, it becomes the wall cost to have only 80 yuan/m
2About, work efficiency has improved four times.Facts have proved cut ooze respond well, especially after great flood piping in 98 years Jiujiang sincere heart dike is in groups reinforced with this technology, (flood level was than 98 years low 0.34m in 99 years, 98 years together high water level duration) do not find place piping, present this technology patent applied for, application number is 98110514.9, and is by name: a kind of cut-off wall for dyke and dam and job practices thereof.This technology has been widely used in basin main dike stabilization workss such as the Changjiang river, the Yellow River, Huaihe River, Haihe River, Song Hua River, Taihu Lake, uses the impervious wall area and has surpassed 1,000,000 m
2, for country's saving fund above hundred million yuans.
Multi-drill small-diameter deep-layer mixing pile cut-off wall technology is to utilize common deep-mixed pile curing mechanism, on the basis of original pile-formation process, develop and develop, technical method is, make curing compound with cement paste, by multi-drill small-diameter deep-layer mixing pile machine (patent No. is 98235301.4) cement paste is sprayed into soil layer, drill bit stirs simultaneously, utilize a series of physical-chemical reactions that produce between curing compound, the soil body and the water, cement-soil is hardened become to have good integrity, stability, impermeability, and have the impervious cement-earth wall of certain intensity.The main technique flow process has: the backguy setting-out, make the stake position with scale; Stir the system cement paste; Main frame is in place, the leveling main frame; The operation pump for mortar transmission is to the defeated slurry of main frame drilling rod; Start main frame, the drill bit rotary drill buried and gunite, creep into projected depth after, drill bit still stirs whitewashing to the ground of constructing when promoting drilling rod, finish the construction of a unit wall, the overlap joint size by designing requirement moves forward then, and lapping construction repeats aforementioned process.
It is overlap joint problem between the unit wall that multi-drill small-diameter deep-layer mixing pile cuts subject matter that the technology of oozing exists.Because drilling rod the time has certain gradient in construction, along with the increase deep overlap joint deviation of construction depth can increase, even can cause the jag phenomenon, have a strong impact on to cut and ooze effect.At present, common processing method is to increase the overlap joint size with the diameter that increases all drill bits in the bull.This processing method has strengthened makes the wall cost.Making into the wall cost has improved more than 50%.Thereby changed the initial invention thought of multi-drill small-diameter deep-layer mixing pile cut-off wall technology, and only keep bull and cancelled the technical scheme of minor diameter (200-300mm), that is to say and only improved work efficiency, reduce and make the cost of wall own.According to experimental study, when inside and outside river potential difference reached 10m, impervious cement-earth wall only needed 100mm thick, just can reach the antiseepage requirement.Through investigation, the flood control level difference generally all is no more than 10m outside China river dyke Ha Noi, and therefore too much thickening impervious wall is a kind of waste.
The purpose of this invention is to provide a kind of impervious cement-earth wall and job practices thereof, the unit wall joint of this impervious cement-earth wall is jag not, cuts to ooze effectively, and its job practices is reliable, simple, easily row, cost are low.
For achieving the above object, the present invention takes following technical scheme: the stake that this impervious cement-earth wall is formed by cement paste and the abundant mix of dykes and dams original soil, and with more than two and cut mutually overlap joint the stake be the unit wall, construct by the multiple-unit wall and to form, cut overlap joint one single hole stake between two of adjacent two unit walls mutually, the aperture of this single hole stake is greater than the aperture of the stake in the unit wall.
Cut to ooze at multi-drill small-diameter deep-layer mixing pile and add a larger-diameter cement earth pile between the unit wall, two unit walls before and after connecting under the situation of the diameter that does not increase other, have increased the overlap joint size.Make not jag of unit wall joint.
The job practices of impervious cement-earth wall of the present invention be on the job practices basis of original multi-drill small-diameter deep-layer mixing pile cut-off wall, carry out improved, former method is to adopt the subdivision wall construction in order of deep layer Beater operator method, the stake that each unit wall is constructed simultaneously is to cut mutually more than two and between each, job practices of the present invention is to have increased a single hole stake between the unit wall, according to the construction different order of unit wall and single hole stake following four kinds of methods is arranged:
First kind of methods:
(1) carry out the construction of a single hole stake earlier, the aperture of this single hole stake is greater than the aperture of the stake in the unit wall;
And make the stake of the tail end in the first module wall cut overlap joint mutually (2) and then carry out the construction of first module wall, with the single hole stake;
(3) carry out the construction of the second unit wall again, and make the stake of this unit head end within the walls cut overlap joint mutually with the single hole stake;
Repeat above-mentioned single hole pile driving construction, overlap the work progress of unit wall again, be linked to be required cement anti-seepage wall until whole stakes.
Second kind of job practices:
(1) carries out the construction of first module wall earlier;
(2) and then carry out the construction of a single hole stake, the aperture of this single hole stake is greater than the aperture of the stake in the unit wall, and makes the overlap joint that cuts mutually of tail end in this single hole stake and the first module wall;
(3) carry out the construction of the second unit wall again, and make the stake of this unit head end within the walls cut overlap joint mutually with the single hole stake;
Repeat the work progress of above-mentioned overlap joint one single hole stake between two unit walls, be linked to be required cement anti-seepage wall up to the portion stake of closing.
The third job practices:
(1) carries out the construction of each unit wall in order earlier, and give between each unit wall and reserve the interval that is used to overlap the single hole stake;
(2) on the interval between each unit wall, carry out the construction of a single hole stake more respectively, the aperture of single hole stake is greater than the aperture of the stake in the unit wall, and make each single hole stake respectively with two side unit walls in the stake, the stake of head end of tail end cut overlap joint mutually so that all the unit wall is linked to be required cement anti-seepage wall.
The 4th kind of job practices:
(1) carries out earlier the construction of each single hole stake in order, and give between each single hole stake and reserve the interval that is used to overlap the unit wall;
(2) again in the front portion of the first single hole stake, the rear portion of last single hole stake, reach the construction of carrying out the unit wall on the interval between each single hole stake respectively, and the aperture of the stake in the unit wall is less than the aperture of single hole stake, and make the stake of the tail end in each unit wall, the stake of head end cut overlap joint mutually with adjacent single hole stake, so that all stake is linked to be required cement anti-seepage wall.
The job practices of impervious cement-earth wall of the present invention has increased the overlap joint size on the one hand, after considering that drilling rod tilts, has guaranteed one-tenth wall minimum thickness, does not roll up into the wall cost on the other hand again.
The invention will be further described in conjunction with the accompanying drawings with embodiment below.
Fig. 1 cuts the overlap joint schematic diagram mutually for unit wall and single hole stake
Embodiment.
Carry out the backguy setting-out earlier, make the stake position with scale, stir system cement then, adopt common single head deep-mixed pile machine, the diameter of the drilling rod of this machine is bigger than the diameter of the drilling rod of the multi-drill small-diameter deep-layer mixing pile machine of beating the unit wall.Earlier that this machine is in place, and this machine of leveling, the operation slush pump is to the defeated slurry of the drilling rod of this machine, after creeping into projected depth, drill bit still stirs the single hole stake is finished in whitewashing to the ground of constructing construction when promoting drilling rod, as shown in Figure 1, this single hole stake is No. 5 stakes 5 among the figure, in 24 hours, adopt multi-drill small-diameter deep-layer mixing pile machine (patent No. is 98235301.4) again, stand on this machine underframe is provided with four drilling rods that are connected with rotating disk, every drilling rod is divided into drill bit, and every drilling rod all is communicated with the slush pump outlet.This machine is in place, and this machine of leveling, the drilling rod that is positioned at tail end of this machine is cut mutually with No. 5 stakes 5, then, the operation slush pump is to the defeated slurry of the drilling rod of this machine, creep into projected depth after, drill bit still stirs whitewashing to the ground of constructing when promoting drilling rod, finish the construction of first module wall, as shown in Figure 1, this unit wall has four piles, be respectively 3, No. 4 stakes 4 of 2, No. 3 stakes of 1, No. 2 stakes of No. 1 stake, every diameter is 300mm, and the distance of center circle of every pile is 250mm, and four piles cut overlap joint mutually.The diameter that cuts No. 5 stakes of overlap joint with No. 4 stakes 4 mutually is 500m.Earlier play No. 10 stakes by said sequence then, make a call to the second unit wall with the multi-drill small-diameter deep-layer mixing pile machine again, i.e. No. 6 stakes, No. 7 stakes, No. 8 stakes, No. 9 stakes with common single head deep-mixed pile machine.As shown in Figure 1, the second unit wall No. 6 stakes 6 are cut overlap joint mutually with No. 5 stakes 5.Construct by this piling order, be linked to be required cement anti-seepage wall until whole stakes.Simple on technology.
Above-mentioned only for an embodiment of job practices of the present invention.In the practice of construction scene, can be according to equipment, conditions such as geography can be adjusted the sequence of construction of single hole stake and unit wall.
Cement anti-seepage wall of the present invention the overlap joint thickness between the unit stake within the walls, and the unit wall between overlap joint to analyze technically be feasible.As shown in Figure 1, overlap joint thickness between the unit stake within the walls minimum thickness as calculated is 166mm, greater than 100mm, meet design requirement,, have constraint to connect between its 1-4 drill bit owing to adopt multi-head small-diameter deep layer mixer, make to overlap continuously between the stake and once become wall, therefore overlap joint is guaranteed, and the overlap joint between the unit wall minimum overlap joint of Y direction thickness as calculated is 286mm, and the directions X overlap joint is of a size of 150mm.When big-wall reaches 15m deeply, if after considering the drilling rod inclination of 0.8% (obtaining), then still can satisfy the requirement that thickens 100mm through a large amount of engineering tests statistics, if No. 5 stake enlarged diameter are arrived 600mm, even 700mm, then overlapping size also can be bigger, becomes the wall degree of depth to increase to more than the 20m.The joint of unit wall jag not like this, cut ooze effective.
Job practices of the present invention is fine on technology, as shown in Figure 1, No. 1 to No. 4 stake the 1,2,3, the 4th adopts the multi-drill small-diameter deep-layer mixing pile machine to realize, No. 5 stakes 5 are to be realized by plain edition deep-mixed pile machine, during construction by No. 5 stakes 5 of constructing earlier in front of common deep-mixed pile machine, again by special multi-drill small-diameter deep-layer mixing pile machine construction 1-4 stake 1,2,3,4, so construction just forms continuous cement-soil cut-off wall in succession in 24 hours.Simple on the technology, reliable.
By analysis, at 300 yuan/t of cement unit, cement mixed weight is no more than at 15% o'clock, and 1-4 one-tenth wall cost is at 80 yuan/m
2About.After considering the factor of No. 5 stakes, becoming the wall comprehensive cost is 110 yuan/m
2, with the wall of 500mm diameter, can save cost more than 40% than all.
In sum, the joint of the unit wall of impervious cement-earth wall of the present invention is jag not, cut ooze effective.Job practices of the present invention is technical reliably, technology is simple, easily go, cost is low economically.
Claims (5)
1, a kind of impervious cement-earth wall, it is the stake that forms by cement paste and the abundant mix of dykes and dams original soil, and with more than two and cut mutually overlap joint the stake be the unit wall, construct by the multiple-unit wall and to form, it is characterized in that: cut overlap joint one single hole stake between two of adjacent two unit walls mutually, the aperture of this single hole stake is greater than the aperture of the stake in the unit wall.
2, the job practices of the described impervious cement-earth wall of claim 1 is to adopt the subdivision wall construction in order of deep layer Beater operator method, and the stake that each unit wall is constructed simultaneously is to cut mutually more than two and between each, and it is characterized in that: this method comprises the steps:
(1) carry out the construction of a single hole stake earlier, the aperture of this single hole stake is greater than the aperture of the stake in the unit wall;
And make the stake of the tail end in the first module wall cut overlap joint mutually (2) and then carry out the construction of first module wall, with the single hole stake;
(3) carry out the construction of the second unit wall again, and make the stake of this unit head end within the walls cut overlap joint mutually with the single hole stake;
Repeat above-mentioned single hole pile driving construction, overlap the work progress of unit wall again, be linked to be required cement anti-seepage wall until whole stakes.
3, the job practices of the described impervious cement-earth wall of claim 1 is to adopt the subdivision wall construction in order of deep layer Beater operator method, and the stake that each unit wall is constructed simultaneously is to cut mutually more than two and between each, and it is characterized in that: this method comprises the steps:
(1) carries out the construction of first module wall earlier;
(2) and then carry out the construction of a single hole stake, the aperture of this single hole stake is greater than the aperture of the stake in the unit wall, and makes the overlap joint that cuts mutually of tail end in this single hole stake and the first module wall;
(3) carry out the construction of the second unit wall again, and make the stake of this unit head end within the walls cut overlap joint mutually with the single hole stake;
Repeat the work progress of above-mentioned overlap joint one single hole stake between two unit walls, be linked to be required cement anti-seepage wall up to the portion stake of closing.
4, the job practices of the described impervious cement-earth wall of claim 1 is to adopt the subdivision wall construction in order of deep layer Beater operator method, and the stake that each unit wall is constructed simultaneously is to cut mutually more than two and between each, and it is characterized in that: this method comprises the steps:
(1) carries out the construction of each unit wall in order earlier, and give between each unit wall and reserve the interval that is used to overlap the single hole stake;
(2) on the interval between each unit wall, carry out the construction of a single hole stake more respectively, the aperture of single hole stake is greater than the aperture of the stake in the unit wall, and make each single hole stake respectively with two side unit walls in the stake, the stake of head end of tail end cut overlap joint mutually so that all the unit wall is linked to be required cement anti-seepage wall.
5, the job practices of the described impervious cement-earth wall of claim 1 is to adopt the subdivision wall construction in order of deep layer Beater operator method, and the stake that each unit wall is constructed simultaneously is to cut mutually more than two and between each, and it is characterized in that: this method comprises the steps:
(1) carries out earlier the construction of each single hole stake in order, and give between each single hole stake and reserve the interval that is used to overlap the unit wall;
(2) again in the front portion of the first single hole stake, the rear portion of last single hole stake, reach the construction of carrying out the unit wall on the interval between each single hole stake respectively, and the aperture of the stake in the unit wall is less than the aperture of single hole stake, and make the stake of the tail end in each unit wall, the stake of head end cut overlap joint mutually with adjacent single hole stake, so that all stake is linked to be required cement anti-seepage wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001061097A CN1148492C (en) | 2000-04-25 | 2000-04-25 | Impervious cement-earth wall and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB001061097A CN1148492C (en) | 2000-04-25 | 2000-04-25 | Impervious cement-earth wall and its construction method |
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| CN1320745A true CN1320745A (en) | 2001-11-07 |
| CN1148492C CN1148492C (en) | 2004-05-05 |
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| CNB001061097A Expired - Fee Related CN1148492C (en) | 2000-04-25 | 2000-04-25 | Impervious cement-earth wall and its construction method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465383C (en) * | 2006-06-26 | 2009-03-04 | 河海大学 | Multiple head small diameter long screw drilling wall forming machine |
| CN101864764A (en) * | 2010-05-04 | 2010-10-20 | 中交第二航务工程局有限公司 | Retaining wall structure of Y-shaped rock-inlaid trough section of diaphgram wall and trough-forming construction method thereof |
| CN113756285A (en) * | 2021-09-17 | 2021-12-07 | 山东源基建设工程有限公司 | Cement-soil impervious wall and construction method thereof |
-
2000
- 2000-04-25 CN CNB001061097A patent/CN1148492C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465383C (en) * | 2006-06-26 | 2009-03-04 | 河海大学 | Multiple head small diameter long screw drilling wall forming machine |
| CN101864764A (en) * | 2010-05-04 | 2010-10-20 | 中交第二航务工程局有限公司 | Retaining wall structure of Y-shaped rock-inlaid trough section of diaphgram wall and trough-forming construction method thereof |
| CN113756285A (en) * | 2021-09-17 | 2021-12-07 | 山东源基建设工程有限公司 | Cement-soil impervious wall and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN1148492C (en) | 2004-05-05 |
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Granted publication date: 20040505 Termination date: 20140425 |